Having to keep tank full to run (STIHL)

Discussion in 'Mechanic and Repair' started by unkownfl, Aug 26, 2010.

  1. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837

    I just bought this used Stihl hs80 hedge trimmer. Now I'm having to keep the tank full in order to keep it running. What would cause this issue? I have already cleaned the carb completely, check the spark arestor and changed the coil on this machine.
  2. Restrorob

    Restrorob LawnSite Fanatic
    Messages: 11,029

    Just a guess from the 4 stroke joke, Sounds like you got your fuel lines back on the carb backwards. The return is the short hose in the tank and the fuel pick-up is the long one, I've also seen the pick-up line rot and break in half inside the tank.
  3. unkownfl

    unkownfl LawnSite Gold Member
    Messages: 3,837

    Which line goes to the primer bulb the long one or the short one? I have the longer line going to the furthest connection point and the shortest line barely reaches the the other.

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